I don't imagine that the dentists won't try and lobby something to put the kibosh on this.
Even if it does go through and is generally made available Dentists will still profit. There will still be a need for dentures and partials at least because there are cases where things like underlying health issues cause the teeth to degrade. There are even medications out there that people have to rely on that wreak havoc on one's teeth.
I really am hopeful about this gel, though. In an age where so many people do not have health insurance, let alone dental, this would be a Godsend.